Tungsten modified by potassium doping and rhenium addition for fusion reactor applications

Shuhei Nogami; Akira Hasegawa; Makoto Fukuda; Shotaro Watanabe; Jens Reiser; Michael Rieth

doi:10.1016/j.fusengdes.2019.111445

Tungsten modified by potassium doping and rhenium addition for fusion reactor applications

Shuhei Nogami, Akira Hasegawa, Makoto Fukuda, Shotaro Watanabe, Jens Reiser, Michael Rieth

ENG - Quantum Science and Energy Engineering

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Low temperature brittleness, high ductile-to-brittle transition temperature (DBTT), and recrystallization-induced embrittlement are potential drawbacks related to the thermo-mechanical properties of tungsten (W) for application to the plasma facing materials of future fusion reactor divertors. To improve the thermo-mechanical properties of W, potassium (K) doping and rhenium (Re) addition have been applied as a dispersion-strengthening and a solid solution alloying methods, respectively. In this paper, the individual and synergistic effects of K-doping and Re-addition on the recrystallization behavior, tensile properties, and Charpy impact properties of W plate fabricated by powder metallurgy and hot rolling were investigated.

Original language	English
Article number	111445
Journal	Fusion Engineering and Design
Volume	152
DOIs	https://doi.org/10.1016/j.fusengdes.2019.111445
Publication status	Published - 2020 Mar

Keywords

Mechanical property
Potassium doping
Recrystallization
Rhenium addition
Tungsten

ASJC Scopus subject areas

Civil and Structural Engineering
Nuclear Energy and Engineering
Materials Science(all)
Mechanical Engineering

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10.1016/j.fusengdes.2019.111445

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title = "Tungsten modified by potassium doping and rhenium addition for fusion reactor applications",

abstract = "Low temperature brittleness, high ductile-to-brittle transition temperature (DBTT), and recrystallization-induced embrittlement are potential drawbacks related to the thermo-mechanical properties of tungsten (W) for application to the plasma facing materials of future fusion reactor divertors. To improve the thermo-mechanical properties of W, potassium (K) doping and rhenium (Re) addition have been applied as a dispersion-strengthening and a solid solution alloying methods, respectively. In this paper, the individual and synergistic effects of K-doping and Re-addition on the recrystallization behavior, tensile properties, and Charpy impact properties of W plate fabricated by powder metallurgy and hot rolling were investigated.",

keywords = "Mechanical property, Potassium doping, Recrystallization, Rhenium addition, Tungsten",

author = "Shuhei Nogami and Akira Hasegawa and Makoto Fukuda and Shotaro Watanabe and Jens Reiser and Michael Rieth",

note = "Funding Information: Authors are grateful to Dr. Toru Ohnuma of Research Center for Remediation Engineering of Living Environments Contaminated with Radioisotopes, Tohoku university for supporting our works using an SEM (JSM-6510, JEOL Ltd.) of their research center. Authors are also grateful to the staff of Miyakojima Seisakusho Co. Ltd. for their optimization of the fabrication process of mechanical test specimens, and to the staff of Dai-Ichi Kiden Co., Ltd. for their support with the heat treatment. This work was supported by JSPS KAKENHI Grant Number 15KK0224 , 26289351 , and 18H01196 . In addition, this work was performed with the support and under the auspices of the National Institute for Fusion Science (NIFS) Collaboration Research program ( NIFS11K0BF019 ). Appendix A Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = mar,

doi = "10.1016/j.fusengdes.2019.111445",

language = "English",

volume = "152",

journal = "Fusion Engineering and Design",

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AU - Nogami, Shuhei

AU - Hasegawa, Akira

AU - Fukuda, Makoto

AU - Watanabe, Shotaro

AU - Reiser, Jens

AU - Rieth, Michael

N1 - Funding Information: Authors are grateful to Dr. Toru Ohnuma of Research Center for Remediation Engineering of Living Environments Contaminated with Radioisotopes, Tohoku university for supporting our works using an SEM (JSM-6510, JEOL Ltd.) of their research center. Authors are also grateful to the staff of Miyakojima Seisakusho Co. Ltd. for their optimization of the fabrication process of mechanical test specimens, and to the staff of Dai-Ichi Kiden Co., Ltd. for their support with the heat treatment. This work was supported by JSPS KAKENHI Grant Number 15KK0224 , 26289351 , and 18H01196 . In addition, this work was performed with the support and under the auspices of the National Institute for Fusion Science (NIFS) Collaboration Research program ( NIFS11K0BF019 ). Appendix A Publisher Copyright: © 2020 Elsevier B.V.

PY - 2020/3

Y1 - 2020/3

N2 - Low temperature brittleness, high ductile-to-brittle transition temperature (DBTT), and recrystallization-induced embrittlement are potential drawbacks related to the thermo-mechanical properties of tungsten (W) for application to the plasma facing materials of future fusion reactor divertors. To improve the thermo-mechanical properties of W, potassium (K) doping and rhenium (Re) addition have been applied as a dispersion-strengthening and a solid solution alloying methods, respectively. In this paper, the individual and synergistic effects of K-doping and Re-addition on the recrystallization behavior, tensile properties, and Charpy impact properties of W plate fabricated by powder metallurgy and hot rolling were investigated.

AB - Low temperature brittleness, high ductile-to-brittle transition temperature (DBTT), and recrystallization-induced embrittlement are potential drawbacks related to the thermo-mechanical properties of tungsten (W) for application to the plasma facing materials of future fusion reactor divertors. To improve the thermo-mechanical properties of W, potassium (K) doping and rhenium (Re) addition have been applied as a dispersion-strengthening and a solid solution alloying methods, respectively. In this paper, the individual and synergistic effects of K-doping and Re-addition on the recrystallization behavior, tensile properties, and Charpy impact properties of W plate fabricated by powder metallurgy and hot rolling were investigated.

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Tungsten modified by potassium doping and rhenium addition for fusion reactor applications

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